Butte Montana MSA Mining Hard Hat Helmet
Updated August 7, 2026
| Lot number | 739 |
| Estimate | 25.00 - 50.00 USD |
| Category | Firearms & Militaria |
| Auction | The Richest Hill on Earth - Day 1 |
| Date | August 13, 2026 at 9:59 PM MDT |
| Auction house | Davis Brothers Auction |
| Location | Missoula, Montana |
Koehler Mfg. Co. 24" circumference.
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